I think you are missing the whole point of what is being suggested. There is no DNSSEC if clients are talking directly with authoritative services using DNS over TLS. No signatures, no sovereign countries who controls keys, not anything which is defined by the DNSSEC. Once a client is securely connect to an authoritative service using TLS, everything that the server is transmitting is by definition authenticated. The client need to traverse the tree of authoritative servers by itself, but that is the only drawback.